Structural and Dielectric Progression of 5 % Gd Doped BiFeO3 Nanoparticles Through Cr (2-8%) Doping

Authors

  • MN Hossain Department of Glass and Ceramic Engineering (GCE), Bangladesh University of Engineering and Technology (BUET), Dhaka 1000, Bangladesh
  • MA Matin Department of Glass and Ceramic Engineering (GCE), Bangladesh University of Engineering and Technology (BUET), Dhaka 1000, Bangladesh
  • MM Rhaman Department of Glass and Ceramic Engineering (GCE), Bangladesh University of Engineering and Technology (BUET), Dhaka 1000, Bangladesh
  • MA Ali Department of Physics, Chittagong University of Engineering and Technolgy (CUET), Chattogram 4349, Bangladesh
  • MA Hakim Department of Glass and Ceramic Engineering (GCE), Bangladesh University of Engineering and Technology (BUET), Dhaka 1000, Bangladesh
  • SK Roy Department of Physics, Chittagong University of Engineering and Technolgy (CUET), Chattogram 4349, Bangladesh

DOI:

https://doi.org/10.3329/jes.v12i3.57483

Keywords:

Nanoparticles, BiFeO3, Microstructure, Dielectrics, Electron microscopy, AC conductivity

Abstract

This study reports the structural modifications in undoped multiferroic BiFeO3 (bismuth ferrite or BFO) nanoparticles caused by doping at both the A-site (by 5% Gd) and B-site (by 2-8% Cr) and the resulting improvements in dielectric characteristics. Both un-doped and doped BFO nanoparticles were synthesized using the sol-gel technique and annealed at 600°C for crystallization. X-ray diffractometry (XRD) reveals a phase transition from rhombic (R3c) to orthorhombic (Pn21a). Field Emission Scanning Electron Microscopy (FESEM) study shows the production of nanoparticles with sizes ranging from 80 to 130 nm. Impedance analyzer experiments (100 Hz-10 MHz) show that the dielectric characteristics of doubly doped BFO are very stable over a wide frequency range. The dielectric permittivity of co-doped BFO decreases with Cr doping concentration up to x = 0.06 before reversing. The conductivity drops dramatically as the Cr content rises.

Journal of Engineering Science 12(3), 2021, 101-110

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Published

2022-01-10

How to Cite

Hossain, M., Matin, M., Rhaman, M., Ali, M. ., Hakim, M., & Roy, S. (2022). Structural and Dielectric Progression of 5 % Gd Doped BiFeO3 Nanoparticles Through Cr (2-8%) Doping. Journal of Engineering Science, 12(3), 101–110. https://doi.org/10.3329/jes.v12i3.57483

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